Police, bystanders and soldiers aid a fallen soldier at the War Memorial as police respond, Oct. 22, 2014 in Ottawa.

A police officer runs with his weapon drawn outside Parliament Hill in Ottawa on Oct. 22, 2014.

An Ottawa police officer holds up a length of police tape for pedestrians leaving the downtown area following shooting incidents in Ottawa, Oct. 22, 2014.

A Royal Canadian Mounted Police officer stands guard on Metcalfe Street following shootings in downtown Ottawa, Oct. 22, 2014.

A bomb disposal robot rolls towards Parliament Hill following shootings in downtown Ottawa on Oct. 22, 2014.

Police tape surrounds the Canadian War Memorial in Ottawa, Oct. 22, 2014.

Emergency personnel tend to a soldier shot at the National Memorial near Parliament Hill in Ottawa, Oct. 22, 2014.

Paramedics and police pull a victim away from the Canadian War Memorial in Ottawa, Canada, Oct. 22, 2014.

This photo showing the caucus room doors barricaded with chairs after the shooting was posted to Twitter by @ctvottawa.

Police officers take cover near Parliament Hilll following a shooting incident in Ottawa, Oct. 22, 2014.

A police officer stands watch outside a Starbucks in Ottawa, Ontario after multiple shootings on Oct. 22, 2014.

Parliamentary staff leave the area after a shooting on Parliament Hill in Ottawa on Oct. 22, 2014.

Police respond to the scene on Parliament Hill in Ottawa, Oct. 22, 2014.

A Royal Canadian Mounted Police intervention team responds to a reported shooting at Parliament Hill in Ottawa, Canada Oct. 22, 2014.

A police officer secures the scene of a shooting on Parliament Hill in Ottawa, Oct. 22, 2014.

A heavily armed Royal Canadian Mounted Police officer stands guard at 24 Sussex, the residence of Canada's Prime Minister Stephen Harper in Ottawa, Oct. 22, 2014.

Peter Henderscare posted this photo to Twitter, Oct. 22, 2014, after a soldier was reported shot at the National War Memorial in Ottawa, Canada.

Gerry Byrne posted this photo on twitter from Centre Block at Parliament Hill in Ottawa, Oct. 22, 2014.

A Royal Canadian Mounted Police intervention team walks past a gate on Parliament Hill in Ottawa, Canada, Oct. 22, 2014.

Police teams enter Centre Block at Parliament Hill in Ottawa, Oct. 22, 2014.